Question

Area of a square field is 24200 meter square, how long will it take for a person to cross the field diagonally at the rate of 4.4 km /hr

a) 3 mins
b) 2.5 mins
c) 4 mins
d) 2 mins ​

Answer 1

Step-by-step explanation:

Area of the square field =24200 sq.m. Let the side of the square be x then

${x}^{2} = 24200 = > x = \sqrt{24200} =$

$110 \sqrt{2}$

Diagonal of the square is √2(side of the square) =>√2(110√2) =>220m => 220/1000 km =>0.22 km. Speed given is 4.4 km/hr. So the time taken =0.22/4.4 hr =1/20 hr = 60/20 minutes =3 minutes. So (a) is the correct option. Hope it helps you.